How to Install and Use the Symfony Components

If you're starting a new project (or already have a project) that will use
one or more components, the easiest way to integrate everything is with Composer.
Composer is smart enough to download the component(s) that you need and take
care of autoloading so that you can begin using the libraries immediately.

This article will take you through using The Finder Component, though
this applies to using any component.

1. If you're creating a new project, create a new empty directory for it.

2. Open a terminal and use Composer to grab the library.

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$ composer require symfony/finder

The name symfony/finder is written at the top of the documentation for
whatever component you want.

Tip

Install composer if you don't have it already present on your system.
Depending on how you install, you may end up with a composer.phar
file in your directory. In that case, no worries! Just run
php composer.phar require symfony/finder.

3. Write your code!

Once Composer has downloaded the component(s), all you need to do is include
the vendor/autoload.php file that was generated by Composer. This file
takes care of autoloading all of the libraries so that you can use them
immediately:

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// File example: src/script.php// update this to the path to the "vendor/"// directory, relative to this filerequire_once__DIR__.'/../vendor/autoload.php';useSymfony\Component\Finder\Finder;$finder=newFinder();$finder->in('../data/');// ...